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Question

1. Premises wiring primarily includes exterior wiring and does NOT include interior wiring. True/False
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2. When a bank of storage batteries is installed in a separate, well ventilated room with an unlocked door, the separate room make the bank of batteries inaccessible True/False
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Code Practice ch 2

Electrical Equipment

QuestionAnswer
1. Premises wiring primarily includes exterior wiring and does NOT include interior wiring. True/False False, Article 100 definitions
2. When a bank of storage batteries is installed in a separate, well ventilated room with an unlocked door, the separate room make the bank of batteries inaccessible True/False False, def 100
3. The most common nominal battery voltage for a lead-acid battery is __ volts per cell 2
4. Capacitors shall be enclosed in vaults or outdoor fenced enclosures in compliance with the applicable provisions of art 110 when they contain more than __- gallons of flammable liquid 3 gallons
5. Under normal operating conditions, in order to prevent destruction of the cell due to ignition of gases within a battery cell, each vented cell shall be equipped with a ___ flame arrester
6. A thermal barrier shall be installed between resistors and combustible material when the distance is less than __ 12 inches
7. Article 450 covers the installation of all tansformers True/False False; 450.1 exceptions
8. Less flammable liquid insulated transformers are permitted to be installed indoors in a Type I or II building if which of the following conditions are met: all of above
9. Dry-type transformers installed outdoors shall have a __ enclosure weather proof
10. In general, dry-type transformers rated over 112 1/2 kVA installed outdoors shall NOT be located within ___ of combustible materials of buildings 12 in
11.In general, the ampacity of the conductors from the generator terminals to the first overcurrent device shall NOT be less than ___ of the nameplate current rating of the generator 115%
12. A sealed battery or battery cell must be equipped with ___ or be designed to prevent__ pressure release vent, scatter of cell parts
13. A 75-kVA dry-type, single-phase, 277 volt primary 120-volt secondary, completely enclosed transformer is installed indoors within six inches of combustible materials. In compliance? True/False True 12 inches
14. A door knob operated by turning and pushing to open the door is NOT permitted on the personnel exit door of a transformer vault doorway. True /False True
15. The ampacity of the capacitor circuit for a capacitor bank shall NOT be less than __ of the rated current of the capacitor 135%
16. Where accessible to unqualified persons, generators shall he no live parts exposed to accidental contact when the generator operates at more than ___ volts to ground 50
17. Voltage transformers installed indoors or enclosed shall be protected with ___ primary fuses
18.In general, where the word transformer is used in Art 450, which of the following installations is it intended to cover I,II, and III
19. After a capacitor is disconnected from the source of supply, the residual voltage of the capacitor shall be reduced to __ volts, nominal, or less within one minute for capacitors rated 600 volts, nominal, or less 50
20. A ___ battery is defined as a battery comprised of one or more rechargeable cells of the lead-acid, nickel-cadmium, or other rechargeable eletro-chemical types stored
21. For other than motor starting service, insulated conductors installed between a resistive element and a controller shall have an insulation with an operating temperature of NOT less than ___ where installed in accordance with art 470 90 degree C
22. The door sill or curb around a liquid-cooled transformer installed to protect a transformer vault doorway shall NOT be less than a height sufficient to confine the oil from the largest transformer in the vault, but in no case be less than __ high 4 in
23. The rating of disconnecting means for a bank of capacitors shall NOT be less than ___ of the rated current of the capacitor bank 135%
24. Generators shall be so located that the replacement of brushes can be readily accomplished. True/False True
25. All transformers and transformer vaults are required to be readily accessible to qualified personnel for inspection or maintenance. True/False False
26.Battery locations ___ (shall/shall not) conform to the working space requirements of 110.26 shall
27. The walls and roofs of transformer vaults shall be constructed of materials which have adequate structural strength for the conditions with a minimum fire resistance of __ hours ?
28. Article __ covers the general requirements for equipment operating at more than 600 volts nominal 490
29. What does Part IV of Article 490 address mobile and portable equipment
30. How is high voltage defined for the purposes of Art 490 more than 600 volts
Created by: JoshHampton
 

 



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